Malicious PDF — malware analysis report

Static analysis result for SHA-256 039ccd6c65154f4e…

MALICIOUS

PDF

72.7 KB Created: 2021-09-13 11:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f588a83688b7f5c8e1ca6ef583ad42d4 SHA-1: 090985bf50057575c7a12ca95ea2cafd3ed9b7b1 SHA-256: 039ccd6c65154f4eed75d8a9f62b29e246c19111cb41f50ccf7d8f15b210a7c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm with numerous URLs pointing to various domains, some of which appear to be compromised WordPress sites. These links likely serve to redirect the user to phishing pages or download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=otg+connector+apk PDF link annotation
    • http://jafra-com.at/userfiles/file/xifurunavabigobepuxopo.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/mikis.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/49255459839.pdfIn PDF document text
    • http://ubest.ru/images/file/34650697135.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/mikubatava.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/v27pouor7cpg5cf21q8sc5l7u1/xokajenurojukano.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/86101719246.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/768529c95434b363f6350bbd8f16ae87/97813396731.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/17552947760.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/nugizosebefujuliwa.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/dujojotapipisemifixemegop.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/lumijibowejosavul.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/guweluxub.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/47529123779.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/runumulok.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/17017898826.pdfIn PDF document text
    • https://predial-rua-nova.pt/056-CovadaLua/images-editor/file/tamilamefofoxidasubepades.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/tosizilepavoro.pdfIn PDF document text
    • https://semot.com/Store/userfiles/file/lolugoxupapaba.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/11499914541.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/61194131639.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e87a3c1062---dakumomikavonep.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/sajalasenitexejewozuku.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/takikivumodomoli.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/94631679619.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20D 10360 bytes
SHA-256: e03b3efee0edec29d573e59276bdd4f59246fb519687bc62d5cfc3673a7dac1b
font_02_sfnt_off0000e9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A5 16784 bytes
SHA-256: c8dccfc98ca8367a2c76fa686502b5283aa2b66e365b860694ecef68279b2c86

Open this report in the interactive analyzer, or submit your own file for analysis.